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minigbm: Add VC4 backend

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BUG=None
TEST=None

Change-Id: I6cece89a42ea41066cd8c4e2fc332898d5edb60a
Reviewed-on: https://chromium-review.googlesource.com/439448
Commit-Ready: Niklas Schulze <me@jns.io>
Tested-by: Niklas Schulze <me@jns.io>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
This commit is contained in:
Niklas Schulze 2017-02-08 15:29:21 +01:00 • committed by chrome-bot
parent d1ae0ffe89
commit 878fed4088
2 changed files with 99 additions and 0 deletions
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vc4.c Normal file
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/*
* Copyright 2017 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifdef DRV_VC4
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <vc4_drm.h>
#include <xf86drm.h>
#include "drv_priv.h"
#include "helpers.h"
#include "util.h"
static struct supported_combination combos[3] = {
{DRM_FORMAT_ARGB8888, DRM_FORMAT_MOD_NONE,
BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
{DRM_FORMAT_RGB565, DRM_FORMAT_MOD_NONE,
BO_USE_RENDERING | BO_USE_SW_READ_OFTEN | BO_USE_SW_WRITE_OFTEN |
BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
{DRM_FORMAT_XRGB8888, DRM_FORMAT_MOD_NONE,
BO_USE_CURSOR | BO_USE_LINEAR | BO_USE_RENDERING | BO_USE_SW_READ_OFTEN |
BO_USE_SW_WRITE_OFTEN | BO_USE_SW_READ_RARELY | BO_USE_SW_WRITE_RARELY},
};
static int vc4_init(struct driver *drv)
{
drv_insert_combinations(drv, combos, ARRAY_SIZE(combos));
return drv_add_kms_flags(drv);
}
static int vc4_bo_create(struct bo *bo, uint32_t width, uint32_t height,
uint32_t format, uint32_t flags)
{
int ret;
size_t plane;
struct drm_vc4_create_bo bo_create;
drv_bo_from_format(bo, width, height, format);
memset(&bo_create, 0, sizeof(bo_create));
bo_create.size = bo->total_size;
ret = drmIoctl(bo->drv->fd, DRM_IOCTL_VC4_CREATE_BO, &bo_create);
if (ret) {
fprintf(stderr, "drv: DRM_IOCTL_VC4_GEM_CREATE failed "
"(size=%zu)\n", bo->total_size);
return ret;
}
for (plane = 0; plane < bo->num_planes; plane++)
bo->handles[plane].u32 = bo_create.handle;
return 0;
}
static void *vc4_bo_map(struct bo *bo, struct map_info *data, size_t plane)
{
int ret;
struct drm_vc4_mmap_bo bo_map;
memset(&bo_map, 0, sizeof(bo_map));
bo_map.handle = bo->handles[0].u32;
ret = drmCommandWriteRead(bo->drv->fd, DRM_VC4_MMAP_BO, &bo_map,
sizeof(bo_map));
if (ret) {
fprintf(stderr, "drv: DRM_VC4_MMAP_BO failed\n");
return MAP_FAILED;
}
data->length = bo->total_size;
return mmap(0, bo->total_size, PROT_READ | PROT_WRITE, MAP_SHARED,
bo->drv->fd, bo_map.offset);
}
struct backend backend_vc4 =
{
.name = "vc4",
.init = vc4_init,
.bo_create = vc4_bo_create,
.bo_import = drv_prime_bo_import,
.bo_destroy = drv_gem_bo_destroy,
.bo_map = vc4_bo_map,
};
#endif